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Product
Special Multi-point Thermocouple for Diffusion Furnace
- Product details
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Features & Applications: Diffusion furnace thermocouples (profile T/C, Paddle TC, Spike TC) are high-precision sensors dedicated to temperature measurement and control in the semiconductor and photovoltaic industries. Among them, profile T/C and Paddle TC are designed to measure and control the temperature at each point inside the diffusion furnace tube, while Spike TC is used to measure and control the temperature at each point outside the diffusion furnace tube. Profile T/C, Paddle TC and Spike TC are available in Type S and Type R, featuring outstanding high precision, long service life and excellent long-term stability.
Please contact us for the complete model list of this product.
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Q
What is a thermocouple?
A
Thermocouples are the preferred solution for extreme temperature applications. They consist of two dissimilar metal wires joined at the measuring end, generating a voltage proportional to the temperature difference.
Working Principle: When two different metals are connected, the thermoelectric effect produces a voltage at the junction. This voltage increases with rising temperature, allowing measurement via reference tables.
Key Advantages:
• Temperature Range: -270°C to 2300°C (depending on type)
• Fast Response Time (typically 0.1–10 seconds)
• Robust Construction, vibration-resistant
• Relatively Low Cost
• No External Power Required
Q
What is the difference between RTD and thermocouple?
A
• RTD (Resistance Temperature Detector): Based on the principle that a metal conductor's resistance increases with temperature, it converts resistance measurements into temperature readings.
• Thermocouple: Operates on the Seebeck effect, where two dissimilar metals in contact generate a thermoelectric voltage proportional to temperature differences.
Features
• RTD: High accuracy, stable signal, excellent linearity, ideal for low to medium temperatures.
• Thermocouple: Simple structure, fast response, high-temperature resistance, wide measurement range.
Pros & Cons
• RTD Pros: High precision, strong anti-interference, reliable low-temperature performance.
Cons: Limited upper temperature range, bulkier size, slightly slower response.
• Thermocouple Pros: Broad temperature range, high-temperature tolerance, rapid response, suitable for moving/surface measurements.
Cons: Lower accuracy at low temperatures, requires cold junction compensation, weaker signal prone to interference.
